<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
<script>
    //遍历一个对象
    var movie = {
        movieName: "长津湖",
        duration:176,
        price:50
    }
    //for in 会遍历出对象的属性
    //对象[k] 得到属性值
    for(var k in movie) {
        //console.log(k);属性名
        //console.log(movie.k);undefined
        console.log(movie[k]);
    }
</script>
</html>